2515531243 has 2 divisors, whose sum is σ = 2515531244. Its totient is φ = 2515531242.

The previous prime is 2515531223. The next prime is 2515531267. The reversal of 2515531243 is 3421355152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2515531243 - 2⁵ = 2515531211 is a prime.

It is not a weakly prime, because it can be changed into another prime (2515531223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257765621 + 1257765622.

It is an arithmetic number, because the mean of its divisors is an integer number (1257765622).

Almost surely, 2^2515531243 is an apocalyptic number.

2515531243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2515531243 is an equidigital number, since it uses as much as digits as its factorization.

2515531243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 31.

The square root of 2515531243 is about 50155.0719568819. The cubic root of 2515531243 is about 1360.0135600940.

Adding to 2515531243 its reverse (3421355152), we get a palindrome (5936886395).

The spelling of 2515531243 in words is "two billion, five hundred fifteen million, five hundred thirty-one thousand, two hundred forty-three".